Bascule-bridge.



No. 894,239. PATENTED JULY 28, 1908. J. B. STRAUSS.

BASGULE BRIDGE.

APPLICATION FILED MAR. 28, 1907.

JOSEPH B. STRAUSS, OF CHlCAGO, ILLINCIS.

n liscurinssnen.

Specification of Letters Patent.

Patented July 28, 1908;

Appiiat'ion ined nach 28, 1907. sereine seem.

To all whom it may concern:

Be it known that l, Josiirii B. STRAUss, a citizen ol'v the United States, residing at Chi` cago, in the county oi (,ooli and State of lllinois7 have invented certain new and useful ln'iproveinent in Basculedridges, of which the following is a specification.

This invention relates to` bascule bridges, and has for its object to provide a new and improved bridge of this description.

Referring to the drawings7 Figure l is a view showing one forni 01"' bridge embodying the invention; Fig. 2 is a sectional view taken on line 2 2- Fig. l; Fig. 3 is a View of one of the sections of the bridge tread; Fig. 4 is a sectional view taken on line 4--4 ol Fig. 2; Fig. 5 is a diagrammatic view showing the electro magnets and circuits; Fig. 6 is a view similar to Fig. 2 showing a modified construction.

Lilie letters refer to like parts throughout the several iigures.

As shown in Fig. l there is a main span A. This niain span is of the type known as the rolling liit bridge, the span rolling upon a suitable support when lifted instead oi' workw ing upon trunnions. The tread of the'brii'lge is niade up of one or more sections B. The main span is provided with one or Inore straight supporting members C, and the sections B are each provided with a straight face BI and a curved face B2. Tdhen a' series of these sections are used they are placed end to end, and the curved faces lorin a con tinuous curve upon which the bridge rests and rolls. rlhe sectionsB as shown 1n Figs.

2, 3 and 4 are made up of hollow pieces pro.

vided with flangesor radial projections B3 and B4 engaging with the su porting inem* bers C. The straight mem ers C `are insorted between the sections B as shown in Fig .3. Theinain span is also provided with the plates or parts C1 which are located belates C1,

as by means of the angle iron. C2, ln Fig. 6.

the sections B are arrangjd so that the flanges B8 are on the out s :e or" the part C1 instead of between tliern, as shown in Fig. 2.

l- The main spant is preferably provided with radial projecting members C engaging withthe sections B so as to better transmit the f' shear stresses. lt will be seen that this way the tendency oi the track or tread to shear oil under the action of the rolling niovenient is obviated and the inost serious objection to this type oi bridee thereby removed. lt will also be evident that the tread may be `removed in sections and worn out parts re laced.

Any snita de ineens may be used for lifting and lowering' the bridge. As herein shown there is provided a series of electro magnets D, D1, D2, etc. arranged so as to cooperate with the main span. These electro magnets are placed upon the support E engaged by the tread of the main span. This tread acts, as it were, as an armature and when the electro magnets are successively energized the tread is attracted so as to roll and lift the bridge. Any suitable ineans'iney be used for energizing these electro magnets. As herein shown one end oi the coil of each electro magnet is connected with a conductor F connected to a source of electric supply F1. The other ends of the coils of the electro magnets are connected with contacts G, G1, G2, etc. A movable contact device E is connected with the source of electric supply F1 by the conductor F2.' lt will thusl be seen that by moving the movable Contact H along the contacts G, G1, Gvctc. the electro niagnets D, D1, D2 ete. inay be successivelyT energized. lt will further be seen that by properly proportioning the width ol' contacts G, G1, G2 and the movable Contact H the parts can be arranged so as to have any number of the electro ni agnets energized at one time. lt

will be seen that by means ol this construction the bridge is controlled wi thout the use of gearing of any kind. Any suitable counterweight arrangement may be used. Y As shown in Fig. 1 the counterweight J is pivsol otelly connected by linlr- J1. to a support J2 and is also pivote'lly connected by the connecting piece K with the 'end of the main span Ar lt will be seen that by this arrange ment the counterweight travels back with the main span as it is lifted.

It will be noted that the mein span is provided with a plurality of connecting straight faces at an'angle to each other opposite the support upon which the inain span rolls:

namely, the ends oi the plates or parts C?,`

and that the removable sections B have straight faces which engage ,theV straight faces at the ends ot the` plates C1 and are et tachedto said straight faces, being located between'l the l-s'traghtl'faces of the support. I fThe opposite sides 'of the sections B are curved faces which engifige thesupport upon which ebrid ero y l @Whe segctions B, as it were, form a plurality supporting sections for the main span, and y. the strain on said supporting sections isdi` '.:rectlycommunicated to the web members of fthe main span.` -It-will further b e noted that the supporting sections are directlyconnecte'd P-"to the web members of the main span and act both as flange 'members and a track part.

I claim:

r 1. A bascule span, adapted to rest andv roll upon a support, a tread for said main span comprising a sectional track part removably attached thereto and having. a curved engaging face which engages the support. y A20 2. I A brid e comprising a main span, a support upon -Wich it is ada ted to rest and roll,

';` /said main span provide with a plurality of straight faces at an angle to each-other, va plurality of removable sectionsl having straight faces which engage the straight faces of the main span, the o posite sides of said sections being rovide with curved faces Y Which-engage t e, support upon which the bridge rolls. l

3. A brid e comprising a movable main span :'{lapte to rest and roll upon a support,

said main span provided with a plurality of connecting straight faces at an angle to each other o posite said support, a lurality of removab e sections adapted to e attached to said straight faces and located between the straight faces and the support.

4. A brid e comprising a movable main span adapted to rest and roll upon a su port, said main span provided with a plura ity of connecting straight faces at an angle to each other o posite said support, a )lurality of re movab e sections adapted to e attached to said straight faces and located between the straight faces and the support, and means for moving the main span so that said sections successively engage said support.

5. A bridge comprising a main span, a support upon which it rests and rolls, a tread on coV adapted for direct connection to't 1e web of bridge comprising a main the main span for engaging said support havthe mainvspan, and acting lboth as a ange member and a track part.

'A track part for rolling bridges comprising a series' of flange sections, one face adapted to be connected to the web of the main span, and the other adapted to form 4a rolling surface for the bridge.

l 9. A bridge comprising a main span adapted to `rest and roll upon a support, a plurality of electro magnets associated with said main span, means for successively onergizing said electro ma nets so as to move the main span to its lifte position.

10. ln a bascule bridge an operating mechanism' for said bridge comprising a plurality of electro magnets located in the path of the moving main span, said main span adapted to act as the 'armature for said electro magnets, and means for successively energizing the electro magnets in either direction to lift and lower the bridge.

11.- An operating device for bascule bridges comprising a movable part and a fixed part, an electro magnetic device on the fixed part, and an armature on the movable part, the two arranged so that the application of the current will open or close the movable part.

12. An operating device for bascule bridges comprising a power device adapted to act directly without 'the intervention of gearing upon the movable part to open or close it.

13. An operating device tor bascule bridges com rising two magnetic arts one .con-

D h I nected to the movable part and the tother adjacent thereto, the two arts adapted'to interact so as to open' and) close the'bridge.

14. Abridge comprising a movable `part adapted to rest and roll upon a support, said movable part provided with a pivotcd counterweight, a guide for said lcounterweight ada ted to hold it in an "approximately vertical)position as the bridge moves.' 15. A bridge comprising a movable span adapted to rest and roll upon a support, said span provided with a pivoted counterweight, a link associated with said counterweight, a iixed part to which saidlink connected, the parts arranged so that the counterweight remains approximately vertical during all the various movements'of the bridge.`

. 16. The combination with a rolling lift bridge adapted to rest and roll upon a support, of a counterweight pivotally connected to the end of said bridge and adapted to move with the bridge as it rolls to its open and closed position.- A

JOSEPH B. STRAUSS.

Witnesses:

Ennal K. REYNOLDS, SOPHIE B. WERNER. 

